#include<stdio.h>
#include<stdlib.h>
int main()
{
    int x,y;
    int b=1,r=50,bottom=20;
    int v_x=1;
	for(b=1;b<=bottom;b++)
	{
		system("cls");
		b=b+v_x;
		for(x=1;x<=b;x++)
		printf("\n");
	    for(y=1;y<=r;y++)
		printf(" ");
	 printf("o");
	 printf("\n");
	}
	return 0;
}